{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-63912",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63912",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:55:17.188Z",
    "updatedAt": "2026-10-19T20:17:55.311Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "xfrm: esp: restore combined single-frag length gate",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: esp: restore combined single-frag length gate\n\nThe ESP out-of-place fast path appends the trailer in esp_output_head()\nbefore esp_output_tail() allocates the destination page frag. The\nhead-side gate currently checks skb->data_len and tailen separately, but\nthe tail code allocates a single destination frag from the combined\npost-trailer skb->data_len.\n\nReject the page-frag fast path when the combined aligned length exceeds a\npage. Otherwise skb_page_frag_refill() may fall back to a single page while\nthe destination sg still spans the combined skb->data_len.\n\nRestore this combined-length page gate for both IPv4 and IPv6.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c075c3ea031757f8ea2d34567565b61a868c08d5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "566295735530ee513326049b0540f32ec050bf2e"
            },
            {
              "version": "a583f2f3c8788bffd7fd7baeb76bd6d80543d7ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5d7ab86e2b6bc23054616bf6ac562013bf60af8c"
            },
            {
              "version": "5bd8baab087dff657e05387aee802e70304cc813",
              "status": "affected",
              "versionType": "git",
              "lessThan": "36519e3d941fc99d3b52c134dbaf311f987a4708"
            },
            {
              "version": "5bd8baab087dff657e05387aee802e70304cc813",
              "status": "affected",
              "versionType": "git",
              "lessThan": "322e48187e0245ab2fff6fec2220b0cae677dbec"
            },
            {
              "version": "5bd8baab087dff657e05387aee802e70304cc813",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b84091ceddc9f133229dceab3ccc930bf27f9cba"
            },
            {
              "version": "5bd8baab087dff657e05387aee802e70304cc813",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c093468aea8277f77272a4f199b2e15e19cabb59"
            },
            {
              "version": "5bd8baab087dff657e05387aee802e70304cc813",
              "status": "affected",
              "versionType": "git",
              "lessThan": "65f3b3fc2347b89fe21db1e92c7681368415f095"
            },
            {
              "version": "5bd8baab087dff657e05387aee802e70304cc813",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40"
            },
            {
              "version": "2c66b0c95bb0aa7652ba1eba293d0d5993b35a38",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "ef6f83df1209a7d9bd1c605a62457d4c00f9179e",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3defefd22ad5fbbe639b6157fb7e6311b2bf333d",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "b657030870bb5351c5b1e84d4e9f186da6ca0496",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.113",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.259"
            },
            {
              "version": "5.15.36",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.210"
            },
            {
              "version": "4.14.288",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.252",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.205",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.17.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.18"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.18",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.18"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}